Telephone attachment



' 1,639,525 Aug- 1927' w. s. MARR TELEPHONE ATTACHMENT Filed Jan. 31. 1927 Patented Aug. 16, 1927.

UNITED STATES WINFIELD S. MAB/R, OF COUNCIL BLUFFS, IOWA.

TELEPHONE ATTACHMENT.

Application filed January 31, 1927.

This invention relates to a telephone attachment of that type whereby a telephone receiver and transmitter can be effectively used when the operator is surrounded by disturbing noises, or when he does not desire to have the party to whom he is speaking hear conversation that is taking place in the immediate vicinity of the operator, and has for its object to provide, in a manner as hereinafter set forth, a telephone attachment of such class to damp the vibrations of the diaphragm of the transmitter in order to prevent the noise from without being transmitted and to overcome the plac- 1. ing of the hand over the mouthpiece to prevent the noise from without entering the mouthpiece, and under such conditions provide for effectively using the telephone receiver and transmitter when the operator is surrounded with disturbing noises.

Further objects of the invention are to provide a telephone attachment of the type referred to and in a manner as hereinatfer set forth which is simple in its construction and arrangement, strong, durable, thoroughly efficient in its use, readily attached to a transmitter, and comparatively inexpensive to manufacture, as well as providing an attachment of the type referred to which can be conveniently shifted to perform its function when one is using a telephone receiver and transmitter.

With the foregoing and other objects in view the invention consists in the novel construction, combination, and arrangement of parts, as hereinafter more specifically desscribed and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which fall within the scope of the claims hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the several views:

Figure 1 is perspective view of a telephone, showing the adaptation therewith of an attachment in accordance with this invention.

Figure 2 is a side elevation of an attachment, in accordance with this invention showing the adaptation thereof in connec tion with the transmitter of a telephone.

Figure 3 is a fragmentary view in vertical section of a transmitter and further illustrating in longitudinal section an attachment Serial No. 164,868.

in accordance with this invention and with the attachment connected to the transmitter.

Figure 4 is a front elevation of the transmitter and further illustrating in cross section an attachment in accordance with this invention.

Referring to the drawings in detail 1 denotes the post of a telephone, .and 2 the transmitter and which is provided with a vibratory diaphragm 3. The casing of the transmitter 2 is formed with an opening 4, having the wall thereof threaded, for the purpose of connecting the mouthpiece, re-

ferred to generally by the reference character 5 in position.

The mouthpiece 5 forms an element of the attachment and is set up with a flaring outer portion 6 and a cylindrical portion 7 of uniform inner and outer diameter. The flaring portion 6 is of greater thickness than the cylindrical portion 7 and the outer face of the latter forms a continuation of the outer face of the flaring portion 6. The inner face of the cylindrical portion 7 is offset with respect to the inner face of the flaring portion 6 whereby the latter provides at its inner end a shoulder 8. The cylindrical portion 7 is formed on one side thereof, with a diagonally extending slot 9.

Arranged Within the cylindrical portion 7 and retained therein by the shoulder 8, is a longitudinally shiftable shell 10 having its body portion formed of appropriate thickness and of less thickness than the thickness of the inner end of the flaring portion 6. The shell 10 is of a length slight ly greater than the length of the cylindrical portion 7 and the mouthpiece 5 and normally extends from the inner end of the cylindrical portion 7. Connected to the shell 10 and extending through the slot 9, is a headed pin 11 hearing against a coiled spring 12, which is arranged in the slot 9, as well as being retained therein, by a shifting band 13 for the shell 10. The band 13 is formed with a series of spaced openings 14 and through one of said openings extends the pin 11. The band 13 is formed with an outwardly projecting headed stud 15, which connects a pull chain 16 therewith. The outer end of the pull chain 16 carries a ring 17 for the reception of the thumb 18 of the hand 19 of the operator.

The band 13 is slipped over the cylindrical portion 7 and is attached to the shell 10, over the slot 9, by the pin 11 in a manner so that adownward shift can be had by the chain 16. The apertured band will prevent any possibility of the pin being in a wrong position when the mouthpiece is screwed into the transmitter, and will always insure the pin being on the right side of the mouthpiece directly over the thumb of the right hand to enable a downward pull to be had by the chain on the band and shift the shell 10. On a downward pull of the band, the pin 11 riding in the slot 9, against the action of the spring 12, will shift the shell 10 rearwardly to abut against the diaphragm 3 and damp the vibrations thereof. The foregoing action is had by the thumb of the operator and when the thumb is released from the ring 17, the spring 12 will. restore the shell 10 to its normal position which is as shown in Figure 3.

The attachment provides a thoroughly satisfactory means to damp the vibrations of the diaphragm of the transn'iitter and which can be conveniently had by the operator, and the operator can retain the shell 10 against the diaphragm for any period desired and upon releasing the shell the transmitter will function, therefore it is, thought the many advantages of a telephone; attachment, in accordance with this inven-{ tion to prevent noise from without enteringi the n'iouthpiece and being transmitted, when it is not desired can be readily understood, and although the preferred embodiment of the invention is as illustrated and described,; yet it is to be understood that changes in the; details of construction can be had which will; fall within the scope of the invention as; claimed.

WVhat I claim is: f

1. An attachment for telephone trans-f mitters for the purpose set forth comprising a mouthpiece for connection to the trans mitter, a longitudinally shiftable shell mounted within and supported solely by the rear portion of the body of said mouthpiece and adapted when shifted in one direction to abut and prevent the activity of the diaphragm of the transmitter, and a spring controlled shifting means for said shell and said means connected with the shell, operating in, carried by, guided by and extended through the body of said mouth-piece at the rear thereof.

2. An attachment for telephone transmitters for the purpose set forth comprising a mouthpiece for connection to the transmitter and having its body, at one side .thereof, formed with a slot adjacent the rear end thereof, a longitudinally shiftable shell mounted in said mouthpiece, supported solely by the rear portion of the latter and adapted when shifted in one direction to prevent the activity of the diaphragm of the transmitter, a spring controlled shifting means for said shell slidable in said slot and supported by the outer periphery of the body of the mouthpiece, and a pulling member for said shifting means.

An attachment for telephone transmitters for the purpose set forth COIDPIiSlilg a mouthpiece, a. longitudinally shiftable element mounted solely in and supported by the rear portion thereof and adapted when shifted inwardly to abut and to prevent the activity of the diaphragm of the transmitter, a spring controlled shifting means for said element slidable in and mounted on the body of the mouthpiece, and an operating means for said spring controlled shifting means.

4. An attachment for telephone transmit ters for the purpose set forth a mouthpiece for connection to the transmitter and having its body provided near its rear end with diagonally disposed slot, a longitudinally shiftable element mounted in the rear portion of the mouthpiece and adapted when shifted inwardly to abut and prevent the activity of the diaphragm of the transmitter, a spring controlled pin slidable in said slot for shifting said element, a shiftable band mounted on the mouthpiece, spaced from the outer end of the latter and con- ,nected to the pin, and means for shifting 'said band to provide a sliding movement for the pin against the action of its controlling spring to shift said element inwardly.

, 5. An attachment for telephone transmitlters for the purpose set forth comprising a mouthpiece for connection to the transmitter, spring controlled longitudinally shif able means mounted within and lengthwise lot the rear portion of the mouthpiece, said means supported solely by and extending from the inner end of said rear portion and adapted when shifted in one direction against the action of its controlling spring to abut and prevent the activity of the diaphragm of the transmitter, and means for shifting said spring controlled means against the action of its controlling spring.

6. An attachment for telephone transmitters for the purpose set forth comprising a mouth piece for connection to the transmitter and formed of an outer flaring .portion and a cylindrical inner portion having its inner face offset throughout with respect to the inner face of said outer portion at the inner end of the latter, a longitudinally shiftable shell within and supported solely by said inner portion and a spring controlled shifting means for said shell to cause the latter to abut and prevent the activity of the diaphragm of a transmitter, said means extending through and mounted on said inner portion.

7. An attachment for telephone transmitters for the purpose set forth comprising a mouth piece for connection to the transmitter and including an outer portion and a cylindrical inner portion having its inner face offset throughout with respect to the inner face of said outer portion at the inner end of the latter, said inner portion formed with a diagonal slot, and a longitudinally shiftable shell mounted in and supported solely by said inner portion and adapted when shifted in one direction to abut and prevent the activity of the diaphragm of the transmitter, and spring controlled means connected to said shell and extending through and arranged in said slot and further mounted on said inner portion for shifting said shell.

8. An attachment for telephone transmitters for the purpose set forth comprising a mouth piece for connection to the transmitter and including an outer portion and a cylindrical inner portion having its inner face offset throughout with respect to the inner face of said outer portion at the inner end of the latter, said inner portion formed with a diagonal slot, and a longitudinally shiftable shell mounted in and supported solely by said inner portion and adapted when shifted in one direction to abut to prevent the activity of the diaphragm of tile transmitter, spring controlled means connected to said shell and extending through and arranged in said slot and further mounted on said inner portion for shifting said shell, and a pulling member for actuating said spring controlled means.

9. An attachment for telephone transmitters for the purpose set forth comprising a tubular mouthpiece for connection to the transmitter and provided intermediate the ends of its inner face with a shoulder, a shell mounted in said mouthpiece rearwardly of said shoulder, the interior of said mouthpiece uninterrupted from its outer end to said shoulder and the interior of said shell uninterrupted from end to end, and means carried by said mouthpiece, rear- Wardly of said shoulder and connected to said shell for shifting the latter rearwardly to abut and prevent activity of the diaphragm of the transmitter.

10.-An attachment for telephone transmitters for the purpose set forth comprising a tubular mouthpiece for connection to the transmitter and provided intermediate the ends of its inner face with a shoulder, a shell mounted in said mouthpiece rearwardly of said shoulder, the interior of said mouthpiece uninterrupted from its outer end to said shoulder and the interior of said shell uninterrupted from end to end, and means carried by said mouthpiece, rearwardly of said shoulder and connected to said shell for shifting the latter rearwardly to abut and. prevent activity of the diaphragm of the transmitter, said means being spring controlled and having its controlling spring mounted in the body of the mouthpiece rearwardly of the shoulder.

11. An attachment for.telephone transmitters for the purpose set forth comprising a tubular mouthpiece for connection to the transmitter and provided intermediate the ends of its inner face with a shoulder, a shell mounted in said mouthpiece rear- Wardly of said shoulder, the interior of said mouthpiece uninterrupted from its outer end to said shoulder and the interior of said shell uninterrupted from end to end, and means carried by said mouthpiece, rear- Wardly of said shoulder and connected to said shell for shifting the latter rearwardly to abut and prevent activity of the diaphragm of the transmitter, said shoulder disposed approximately centrally of the inner face of the mouthpiece and said shell of a length to extend from said shoulder to the inner end of the mouthpiece.

In testimony whereof, I affix my signature hereto.

\VINFIELD S. MARK. 

